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In situ Formed α-Al2O3 Nanocrystals Repaired the Preexisting Microcracks in Plasma-Sprayed Al2O3 Coating via Stress-Induced Phase Transformation

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Abstract

In the present study, the phase composition and generation mechanism of the nanocrystals located in the microcracks of plasma-sprayed Al2O3 coating were reevaluated. The Al2O3 coatings were investigated using transmission electron microscopy and x-ray diffraction. We supply the detailed explanations to support the new viewpoint that in situ formation of α-Al2O3 nanocrystals in the preexisting microcracks of the as-sprayed Al2O3 coating may be due to the stress-induced phase transformation. Owing to the partially coherent relationship, the phase interfaces between the α-Al2O3 nanocrystals with the preferred orientation and the γ-Al2O3 matrix may possess better bonding strength. The α-Al2O3 nanocrystals could repair the microcracks in the coating, which further strengthens grain boundaries. Grain boundary strengthening is beneficial to the coating fracture toughness enhancement.

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References

  1. N.N. Ault, Characteristics of refractory oxide coatings produced by flame-spraying, J. Am. Ceram. Soc., 1957, 40(3), p 69-74

    Article  Google Scholar 

  2. R. McPherson, Formation of metastable phase in flame-prepared and plasma-prepared alumina, J. Mater. Sci., 1973, 8(6), p 851-858

    Article  Google Scholar 

  3. C.C. Stahr, S. Saaro, L.-M. Berger, J. Dubský, K. Neufuss, and M. Herrmann, Dependence of the stabilization of alpha-alumina on the spray process, J. Therm. Spray Technol., 2007, 16(5-6), p 822-830

    Article  Google Scholar 

  4. Y. Lin, C. Wang, and J. Tao, Induction effect of alpha-Al2O3 seeds on formation of alumina coatings prepared by double glow plasma technique, Surf. Coat. Technol., 2013, 235, p 544-551

    Article  Google Scholar 

  5. Z. Yin, S. Tao, X. Zhou, and C. Ding, Particle in-flight behavior and its influence on the microstructure and mechanical properties of plasma-sprayed Al2O3 coatings, J. Eur. Ceram. Soc., 2008, 28(6), p 1143-1148

    Article  Google Scholar 

  6. G. Di Girolamo, A. Brentari, C. Blasi, and E. Serra, Microstructure and mechanical properties of plasma sprayed alumina-based coatings, Ceram. Int., 2014, 40(8), p 12861-12867

    Article  Google Scholar 

  7. K. Yang, J. Feng, X. Zhou, and S. Tao, In-situ formed gamma-Al2O3 nanocrystals repaired and toughened Al2O3 coating prepared by plasma spraying, Surf. Coat. Technol., 2012, 206(13), p 3082-3087

    Article  Google Scholar 

  8. K. Yang, X. Zhou, H. Zhao, and S. Tao, Microstructure and mechanical properties of Al2O3-Cr2O3 composite coatings produced by atmospheric plasma spraying, Surf. Coat. Technol., 2011, 206(6), p 1362-1371

    Article  Google Scholar 

  9. K. Yang, J. Chen, F. Hao, C. Liu, S. Tao, and C. Ding, Stress-induced phase transformation and amorphous-to-nanocrystalline transition in plasma-sprayed Al2O3 coating with relative low temperature heat treatment, Surf. Coat. Technol., 2014, 253, p 277-283

    Article  Google Scholar 

  10. A. Rico, C.J. Múnez, and J. Rodríguez, On the relevance of microstructure in the fracture toughness of nanostructured alumina-13% titania coatings, Surf. Coat. Technol., 2014, 243, p 46-50

    Article  Google Scholar 

  11. J.-J. Kang, B.-S. Xu, H.-D. Wang, and C.-B. Wang, Influence of contact stress on rolling contact fatigue of composite ceramic coatings plasma sprayed on a steel roller, Tribol. Int., 2014, 73, p 47-56

    Article  Google Scholar 

  12. S. Widjaja, A.M. Limarga, and T.H. Yip, Modeling of residual stresses in a plasma-sprayed zirconia/alumina functionally graded-thermal barrier coating, Thin Solid Films, 2003, 434(1-2), p 216-227

    Article  Google Scholar 

  13. J. Pina, A. Dias, and J.L. Lebrun, Study by X-ray diffraction and mechanical analysis of the residual stress generation during thermal spraying, Mater. Sci. Eng., A, 2003, 347(1-2), p 21-31

    Article  Google Scholar 

  14. X. Teng, H. Liu, and C. Huang, Effect of Al2O3 particle size on the mechanical properties of alumina-based ceramics, Mater. Sci. Eng., A, 2007, 452-453, p 545-551

    Article  Google Scholar 

  15. A.P. Goswami, S. Roy, M.K. Mitra, and G.C. Das, Microstructure dependent hardness and fracture behavior in liquid-phase-sintered Al2O3, Ceram. Int., 2000, 26, p 397-410

    Article  Google Scholar 

  16. V. Edlmayr, M. Moser, C. Walter, and C. Mitterer, Thermal stability of sputtered Al2O3 coatings, Surf. Coat. Technol., 2010, 204, p 1576-1581

    Article  Google Scholar 

  17. J. Musil, J. Blazek, P. Zeman, S. Proksova, M. Sasek, and R. Cerstvy, Thermal stability of alumina thin films containing gamma-Al2O3 phase prepared by reactive magnetron sputtering, Appl. Surf. Sci., 2010, 257, p 1058-1062

    Article  Google Scholar 

Download references

Acknowledgments

The study is jointly supported by National Nature Science Foundation of China (51302299), Shanghai Nature Science Fund Project (13ZR1446000) and Youth Innovation Promotion Association, Chinese Academy of Sciences. Simultaneously, we are grateful to Inorganic Materials Analysis and Testing Center of Shanghai Institute of Ceramics for providing the support for this work.

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Authors and Affiliations

  1. Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 201899, People’s Republic of China

    Kai Yang, Jingwei Feng, Jian Rong, Chenguang Liu, Shunyan Tao & Chuanxian Ding

  2. The Key Laboratory of Inorganic Coating Materials, Chinese Academy of Sciences, Shanghai, 201899, People’s Republic of China

    Kai Yang, Jian Rong, Chenguang Liu, Shunyan Tao & Chuanxian Ding

  3. Inorganic Materials Analysis and Testing Center, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, People’s Republic of China

    Jingwei Feng

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  1. Kai Yang
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Correspondence to Kai Yang.

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Yang, K., Feng, J., Rong, J. et al. In situ Formed α-Al2O3 Nanocrystals Repaired the Preexisting Microcracks in Plasma-Sprayed Al2O3 Coating via Stress-Induced Phase Transformation. J Therm Spray Tech 25, 518–525 (2016). https://doi.org/10.1007/s11666-015-0367-3

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  • DOI: https://doi.org/10.1007/s11666-015-0367-3

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